
#ifndef DSP2833x_CPU_TIMERS_H
#define DSP2833x_CPU_TIMERS_H

#ifdef __cplusplus
extern "C" {
#endif

/*
---------------------------------------------------------------------------
 CPU Timer Register Bit Definitions:


 TCR: Control register bit definitions:
---------------------------------------------------------------------------
*/
struct  TCR_BITS {          /* bits  description */
   Uint16    rsvd1:4;       /* 3:0   reserved    */
   Uint16    TSS:1;         /* 4     Timer Start/Stop */
   Uint16    TRB:1;         /* 5     Timer reload     */
   Uint16    rsvd2:4;       /* 9:6   reserved         */
   Uint16    SOFT:1;        /* 10    Emulation modes  */
   Uint16    FREE:1;        /* 11                     */
   Uint16    rsvd3:2;       /* 12:13 reserved         */
   Uint16    TIE:1;         /* 14    Output enable    */
   Uint16    TIF:1;         /* 15    Interrupt flag   */
};

union TCR_REG {
   Uint16           all;
   struct TCR_BITS  bit;
};

/* TPR: Pre-scale low bit definitions:*/
struct  TPR_BITS {        /* bits  description */
   Uint16     TDDR:8;     /* 7:0   Divide-down low */
   Uint16     PSC:8;      /* 15:8  Prescale counter low */
};

union TPR_REG {
   Uint16           all;
   struct TPR_BITS  bit;
};

/* TPRH: Pre-scale high bit definitions: */
struct  TPRH_BITS {         /* bits  description */
   Uint16     TDDRH:8;      /* 7:0   Divide-down high */
   Uint16     PSCH:8;       /* 15:8  Prescale counter high */
};

union TPRH_REG {
   Uint16           all;
   struct TPRH_BITS bit;
};

/* TIM, TIMH: Timer register definitions: */
struct TIM_REG {
   Uint16  LSW;
   Uint16  MSW;
};

union TIM_GROUP {
   Uint32          all;
   struct TIM_REG  half;
};

/* PRD, PRDH: Period register definitions:*/
struct PRD_REG {
   Uint16  LSW;
   Uint16  MSW;
};

union PRD_GROUP {
   Uint32          all;
   struct PRD_REG  half;
};

/*
---------------------------------------------------------------------------
 CPU Timer Register File:
---------------------------------------------------------------------------
*/
struct CPUTIMER_REGS {
   union TIM_GROUP TIM;   /* Timer counter register */
   union PRD_GROUP PRD;   /* Period register        */
   union TCR_REG   TCR;   /* Timer control register */
   Uint16          rsvd1; /* reserved               */ 
   union TPR_REG   TPR;   /* Timer pre-scale low    */ 
   union TPRH_REG  TPRH;  /* Timer pre-scale high   */
};

/*
---------------------------------------------------------------------------
 CPU Timer Support Variables:
---------------------------------------------------------------------------
*/

struct CPUTIMER_VARS {
   volatile struct  CPUTIMER_REGS  *RegsAddr;
   Uint32    InterruptCount;
   float   CPUFreqInMHz;
   float   PeriodInUSec;
};

/*
---------------------------------------------------------------------------
 Function prototypes and external definitions:
---------------------------------------------------------------------------
*/

void InitCpuTimers(void);
void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period);

extern volatile struct CPUTIMER_REGS CpuTimer0Regs;
extern struct CPUTIMER_VARS CpuTimer0;

/* 
  CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS. Comment out CpuTimer1 and CpuTimer2 if using DSP BIOS or other 
  RTOS
*/
extern volatile struct CPUTIMER_REGS CpuTimer1Regs;
extern volatile struct CPUTIMER_REGS CpuTimer2Regs;

extern struct CPUTIMER_VARS CpuTimer1;
extern struct CPUTIMER_VARS CpuTimer2;

/* Usefull Timer Operations:*/
/* Start Timer: :*/
#define StartCpuTimer0()   CpuTimer0Regs.TCR.bit.TSS = 0

/* Stop Timer: :*/
#define StopCpuTimer0()   CpuTimer0Regs.TCR.bit.TSS = 1

/* Reload Timer With period Value:*/
#define ReloadCpuTimer0() CpuTimer0Regs.TCR.bit.TRB = 1

/* Read 32-Bit Timer Value:*/
#define ReadCpuTimer0Counter() CpuTimer0Regs.TIM.all

/* Read 32-Bit Period Value:*/
#define ReadCpuTimer0Period() CpuTimer0Regs.PRD.all

/*
 CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
 Do not use these two timers if you ever plan on integrating
 DSP-BIOS or another realtime OS.
 For this reason, comment out the code to manipulate these two timers
 if using DSP-BIOS or another realtime OS.
*/

/* Start Timer:*/
#define StartCpuTimer1()   CpuTimer1Regs.TCR.bit.TSS = 0
#define StartCpuTimer2()   CpuTimer2Regs.TCR.bit.TSS = 0


/* Stop Timer:*/
#define StopCpuTimer1()   CpuTimer1Regs.TCR.bit.TSS = 1
#define StopCpuTimer2()   CpuTimer2Regs.TCR.bit.TSS = 1

/* Reload Timer With period Value:*/
#define ReloadCpuTimer1() CpuTimer1Regs.TCR.bit.TRB = 1
#define ReloadCpuTimer2() CpuTimer2Regs.TCR.bit.TRB = 1

/* Read 32-Bit Timer Value:*/
#define ReadCpuTimer1Counter() CpuTimer1Regs.TIM.all
#define ReadCpuTimer2Counter() CpuTimer2Regs.TIM.all

/* Read 32-Bit Period Value:*/
#define ReadCpuTimer1Period() CpuTimer1Regs.PRD.all
#define ReadCpuTimer2Period() CpuTimer2Regs.PRD.all


#ifdef __cplusplus
}
#endif /* extern "C" */

#endif  /* End Of DSP2833x_CPU_TIMERS_H */
